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paride: convert pf to blk-mq 

Tested-by: Ondrej Zary <linux@rainbow-software.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Jens Axboe 2018-10-15 08:38:08 -06:00
parent 99fe8b02a8
commit 77218ddf46
1 changed files with 42 additions and 14 deletions
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56
drivers/block/paride/pf.c
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@ -152,7 +152,7 @@ enum {D_PRT, D_PRO, D_UNI, D_MOD, D_SLV, D_LUN, D_DLY};
#include <linux/hdreg.h>
#include <linux/cdrom.h>
#include <linux/spinlock.h>
#include <linux/blkdev.h>
#include <linux/blk-mq.h>
#include <linux/blkpg.h>
#include <linux/mutex.h>
#include <linux/uaccess.h>
@ -206,7 +206,8 @@ module_param_array(drive3, int, NULL, 0);
#define ATAPI_WRITE_10 0x2a
static int pf_open(struct block_device *bdev, fmode_t mode);
static void do_pf_request(struct request_queue * q);
static blk_status_t pf_queue_rq(struct blk_mq_hw_ctx *hctx,
const struct blk_mq_queue_data *bd);
static int pf_ioctl(struct block_device *bdev, fmode_t mode,
unsigned int cmd, unsigned long arg);
static int pf_getgeo(struct block_device *bdev, struct hd_geometry *geo);
@ -238,6 +239,8 @@ struct pf_unit {
int present; /* device present ? */
char name[PF_NAMELEN]; /* pf0, pf1, ... */
struct gendisk *disk;
struct blk_mq_tag_set tag_set;
struct list_head rq_list;
};
static struct pf_unit units[PF_UNITS];
@ -277,6 +280,10 @@ static const struct block_device_operations pf_fops = {
.check_events = pf_check_events,
};
static const struct blk_mq_ops pf_mq_ops = {
.queue_rq = pf_queue_rq,
};
static void __init pf_init_units(void)
{
struct pf_unit *pf;
@ -284,14 +291,22 @@ static void __init pf_init_units(void)
pf_drive_count = 0;
for (unit = 0, pf = units; unit < PF_UNITS; unit++, pf++) {
struct gendisk *disk = alloc_disk(1);
struct gendisk *disk;
disk = alloc_disk(1);
if (!disk)
continue;
disk->queue = blk_init_queue(do_pf_request, &pf_spin_lock);
if (!disk->queue) {
disk->queue = blk_mq_init_sq_queue(&pf->tag_set, &pf_mq_ops,
1, BLK_MQ_F_SHOULD_MERGE);
if (IS_ERR(disk->queue)) {
put_disk(disk);
return;
disk->queue = NULL;
continue;
}
INIT_LIST_HEAD(&pf->rq_list);
disk->queue->queuedata = pf;
blk_queue_max_segments(disk->queue, cluster);
blk_queue_bounce_limit(disk->queue, BLK_BOUNCE_HIGH);
pf->disk = disk;
@ -784,18 +799,18 @@ static int pf_queue;
static int set_next_request(void)
{
struct pf_unit *pf;
struct request_queue *q;
int old_pos = pf_queue;
do {
pf = &units[pf_queue];
q = pf->present ? pf->disk->queue : NULL;
if (++pf_queue == PF_UNITS)
pf_queue = 0;
if (q) {
pf_req = blk_fetch_request(q);
if (pf_req)
break;
if (pf->present && !list_empty(&pf->rq_list)) {
pf_req = list_first_entry(&pf->rq_list, struct request,
queuelist);
list_del_init(&pf_req->queuelist);
blk_mq_start_request(pf_req);
break;
}
} while (pf_queue != old_pos);
@ -804,8 +819,12 @@ static int set_next_request(void)
static void pf_end_request(blk_status_t err)
{
if (pf_req && !__blk_end_request_cur(pf_req, err))
if (!pf_req)
return;
if (!blk_update_request(pf_req, err, blk_rq_cur_bytes(pf_req))) {
__blk_mq_end_request(pf_req, err);
pf_req = NULL;
}
}
static void pf_request(void)
@ -842,9 +861,17 @@ repeat:
}
}
static void do_pf_request(struct request_queue *q)
static blk_status_t pf_queue_rq(struct blk_mq_hw_ctx *hctx,
const struct blk_mq_queue_data *bd)
{
struct pf_unit *pf = hctx->queue->queuedata;
spin_lock_irq(&pf_spin_lock);
list_add_tail(&bd->rq->queuelist, &pf->rq_list);
pf_request();
spin_unlock_irq(&pf_spin_lock);
return BLK_STS_OK;
}
static int pf_next_buf(void)
@ -1024,6 +1051,7 @@ static void __exit pf_exit(void)
continue;
del_gendisk(pf->disk);
blk_cleanup_queue(pf->disk->queue);
blk_mq_free_tag_set(&pf->tag_set);
put_disk(pf->disk);
pi_release(pf->pi);
}